byKossentini, Faouzi; Chung, Wilson C.; Smith, Mark J. T
This paper introduces an extension of entropy-constrained residual vector quantization (VQ) where intervector dependencies are exploited. The method, which we call conditional entropy-constrained residual VQ, employs a high-order entropy conditioning strategy that captures local information in the neighboring vectors. When applied to coding images, the proposed method is shown to achieve better rate-distortion performance than that of entropy-constrained residual vector quantization with less... Topics: MAGNETOHYDRODYNAMICS, ENERGY LEVELS, STELLAR MASS, MAGNETIC FIELDS, VELOCITY DISTRIBUTION, DYNAMIC...
byChung, Wilson C.; Kossentini, Faouzi; Smith, Mark J. T
A rate-distortion-constrained statistical motion estimation algorithm is presented here that leads to improvements in subband video coding. The main advantages of the algorithm is that it requires a relatively small number of computations, produces a much smoother motion field, and employs a more effective measure of performance than the conventional mean absolute difference or mean squared error. The proposed ajgorithm circumvents problems in the motion compensation loop such as illumination... Topics: PHOTONICS, ELECTRICAL ENGINEERING, FIBER OPTICS, INTERFEROMETRY, UNIVERSITY PROGRAM, EDUCATION,...